Excavator



FIG. 1 is a perspective view of an excavator according to my new design;

FIG. 2 is a front view of an excavator according to my new design;

FIG. 3 is a rear view of an excavator according to my new design;

FIG. 4 is a left side view of an excavator according to my new design;

FIG. 5 is a right side view of an excavator according to my new design; and,

FIG. 6 is a plan view of an excavator according to my new design. 

The ornamental design for an excavator, as shown and described. 